Churn Rate Calculator

Churn quietly caps your growth. Enter your starting customers and how many you lost in the period, and this gives your churn and retention rate — the number every subscription business should watch.

Need more than the free basics? Knowing this month's churn is one snapshot. Tracking it alongside MRR, growth and cohorts over time is the job — a dashboard tool like Databox pulls it together automatically.

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Why a few percent of churn matters so much

Churn compounds against you. At 5% monthly churn you lose nearly half your customers over a year just to stand still; at 2% it's far gentler. That's why reducing churn is usually cheaper than acquiring new customers to replace the leak. Track it monthly, segment by cohort, and fix the reasons people leave before pouring more into acquisition.

Frequently asked questions

What is a good churn rate?

For most SaaS, 5% monthly or below is considered healthy, and lower is better. Above 10% monthly is a red flag worth investigating.

How is churn rate calculated?

Customers lost during a period divided by customers at the start, as a percentage. Retention is simply 100% minus churn.

Why does reducing churn beat acquisition?

Keeping a customer is usually far cheaper than winning a new one, and lower churn lets every new customer add to growth instead of plugging a leak.

This tool is free and runs entirely in your browser. The link above is an affiliate link: we may earn a commission if you sign up, at no extra cost to you, and it never changes our honest take.